John Tesh

Kirk McKoy / Los Angeles Times

John Tesh is most known for co-hosting "Entertainment Tonight." His character is a holographic Klingon in the "Star Trek: The Next Generation" episode "The Icarus Factor." According to the Star Trek Wiki -- where you can see a picture of John Tesh in Klingon garb -- he received no on-screen credit for his cameo.

John Tesh is most known for co-hosting "Entertainment Tonight." His character is a holographic Klingon in the "Star Trek: The Next Generation" episode "The Icarus Factor." According to the Star Trek Wiki -- where you can see a picture of John Tesh in Klingon garb -- he received no on-screen credit for his cameo.

(Kirk McKoy / Los Angeles Times)

John Tesh is most known for co-hosting "Entertainment Tonight." His character is a holographic Klingon in the "Star Trek: The Next Generation" episode "The Icarus Factor." According to the Star Trek Wiki -- where you can see a picture of John Tesh in Klingon garb -- he received no on-screen credit for his cameo.